Model airplane fan device



Sept. 23, 1947. H. E. EVANS I MODEL AIRPLANE FAN DEVICE 2 Sheets-Sheet 1 Ilblll lllll m ILIIINNM Filed Nov. 15, 1945 Sept. 23, 1947.

`H. EVANS MODEL \AIRPLANE FAN DEVICE Filedv Nov. 13 1945 2 Sheets-Sheet 2 15319, o orz/ IVVENTOR. Homefl'. Ewm

m P y' ATTORIN Patented Sept. 23, 1947 MODEL AIRPLANE FAN DEVICEv ,v

Homer E. Evans, Wellington, Kans., assignor of one-fourth to Eugene S. Veail and'one-half to Harold C. Holman, both of Wellington, Kans.

Application November 13, 1945, Serial No. 628,131

My invention relates to an improvement in model airplane fan devices. The object of my invention is to provide a model airplane having representation of a plurality of engines and propellers thereon that are driven from a single source of power and act as fans.

A further object is toprovlde a model airplane of the kind `mentioned that is supported on a swivel standard so the airplane can be turned in any desired direction.

A still further object is to provide a model airplane of the kind mentioned, the motor representations and propellers are positioned out of parallelism with each other so as to increase the scope of the moving draft of air being moved by the propeller fans.

A still further object is to provide a model airplane of the kind described that may be used for advertising purposes.

A still further object is to provide a model airplane of the kind mentioned that is simple in construction, one that is inexpensive, and that is durable and long lived. These and other objects will be more fully described as this description progresses,

Now referring to the accompanying drawings in which similar numerals of reference designate the same parts throughout the several figures of the drawings:

Fig. 1 is a side view of the model airplane fan device.

Fig. 2 is a top plan View of the model airplane device.

Fig. 3 is an enlarged detail view showing the assembly of the working parts of the machine.

Fig. 4 is an expanded detail perspective view of the propeller drive mechanism.

In the drawings is shown the model airplane as having a body section 5 and wings 6 and I positioned one on either side of the body portion 5. The model airplane is supported on a tubular standard 8 that is provided with a tubular swivel extension portion 9, the upper end of which is rigidly attached to the under side of the body portion 5 of the model airplane. The lower end of the tubular standard 8 is rigidly mounted on a heavy foot or base element I0.

Rigidly mounted in the forward portion of the body 5 is an electric motor I I of the type in which the drive shaft I2 projects on opposite ends ofthe motor.

In the wings 6 and 1 are drive shafts I3 and I4 that are in axial alignment with the motor drive shaft II, and are revolvably carried in bearings I5 having upper and lower portions I5a and I5b 3 Claims. (Cl. 5230-259) that are fashioned to fit between and against the upper and lower sides of their respective wing 6 or 'I. The innerends of the drive shafts I3 and I4 terminate in shaft couplings I6 and I1 that are carried on opposite ends of the motor II, drive shaft I2, so that the motor drive shaft I2 will revolvably drive both shafts I3 and I4 alike. 'I

Formed on the wings B and 1 are motor housings representations, I8, I9, 20 and 2|, in each of which has a bearing support 22 carried therein and in the bearing support is a bearing sleeve 23 in which is revolvabl'y carried a propeller or fan shaft 23, and on the outer end of each propeller or fan shaft 23 is rigidly mounted a propeller or fan element 24.

Rigidly mounted on the rear end of each propeller or fan belt 23 is a sleeve 25 that is provided with set screws 25a for binding the sleeve 25 to the shaft 23, and integrally formed on and about the center axis of a perforated pinion or disk 26.

Working in each perforated pinion 26 is a pin wheel 21 on which is integrally formed a hub sleeve 28 through which the drive shaft I2 or I4 passes. The hub sleeve 28 is provided with a set screw 29 that engage and bears against the drive shaft I3 or I4 to rigidly bind and hold the hub sleeve 28 and pin wheel 21 on the drive shaft I3 or I4 for driving purposes.

The outer ends of the drive shafts I3 and I4 are revolvably carried in bearing elements 30 that are supported by the adjacentstructure of the wings 6 and 1.

An electric cord 3I passes through the base I!) and up through the standard 8 9 in which a control switch 32 in the electric line 3| is located for the control of the electric motor II.

The axes a, b, c, and d of the several shafts 23 converge to a point on the center axis e in the rear of the airplane, therefore the draft of air discharged from each propeller or fan will be in a different horizontal radial direction, therefore a large horizontal area will be covered by the composite discharge from all 0f the fans 24.

The foregoing described device may be a replica of any particular machine that is manufactured and may therefore be used for advertising purposes of that machine; or the device lmay be used as advertising for certain air lines of travel.

Depending on the size in which the device is made, the device may still be used for advertising purposes and still be small enough to be used on an omce desk, or still smaller sizes, minus the shown and described my invention, what I claim is: n Y

1. In a model air-plane fan device of the kindY described; the combination of a replica of an air-plane fuselage and wing elements carried:

thereby, and adjustable support means therefor and attached thereto, a power unit, said power unit being carried in the said fuselage, engine housing representations, said engine housingfrepresentations being spaced apart and carriedon said wings, a pair of drive shafts, saiddrive shafts being positioned, one in each Wing and being connected, one to each end of the drive shaft 0f the power unit, a plurality of propeller shafts, one for and revolvably carried in each of said engine housing representations, each propeller shaft` having a gearthereon and said drive shafts having gears thereon, one for and in engagement with each propeller shaft gear, and propeller like elements, one on each propeller shaft as an air moving means for fan purposes, and means for controlling the operation of the power unit.

2. In a model air-plane ian device of the kind described; the combination dened in claim 1, said combination being further characterized by the said power unit being an electric motor and the means for controlling the power unit being an electric circuit in which the electric motor is included, and said electric circuit having a switch therein for making and breaking the circuit.

3. In a model air-plane fan device of the kind described; the combination defined in claim 1, said combination ,being further characterized by 'the said propeller shafts being positioned at angles acute to the center longitudinal axis of the fuselage to broaden the scope of the air being moved by the several fans.

HOMER E. EVANS.

REFERENCES CITED The following references are of record in the lle of this patent:

UNITED STATES PATENTS Number Name Date 1,146,425- I-Iaimerl July 13, 1915 1,577,169 Boy-le Mar. 16, 1926 1,596,806 Ciller Aug. 17, 1926 1,722,922 Johnson July 30, 1929 1,927,399 Godman Sept. 19, 1933 2,060,699 Tauber Nov. 10, 1936 FOREIGN PATENTS Number Country Date 468,192 Great Britain June 30, 1937 506,802 Great Brita-in June 2, 1939 

